A074291 Positions in the Kolakoski sequence where A000002(n) is 1 if n is odd, or 2 if n is even.

1, 2, 5, 6, 7, 8, 12, 13, 17, 18, 23, 24, 25, 26, 29, 30, 31, 36, 37, 38, 41, 42, 43, 44, 49, 50, 51, 54, 55, 56, 59, 60, 61, 62, 66, 67, 71, 72, 73, 74, 79, 80, 84, 85, 90, 91, 92, 95, 96, 97, 100, 101, 102, 103, 108, 109, 110, 113, 114, 115, 120, 121, 125

Offset

1,2

Comments

Indices where A074290(n) = 0.

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Example

The Kolakoski sequence begins: 1,2,2,1,1,2,... Subtracting 1,2,1,2,1,2,... gives 0,0,1,-1,0,0,... so the sequence begins 1,2,5,6,...

Crossrefs

Cf. A074290.

Sequence in context: A080727 A283974 A028739 * A134026 A220655 A246263

Adjacent sequences: A074288 A074289 A074290 * A074292 A074293 A074294

Keyword

nonn,easy

Author

Jon Perry, Sep 21 2002

Extensions

Extended and offset corrected by Nathaniel Johnston, May 02 2011

Status

approved